## Windows Security Update Prioritizes Your Download Safety
Downloading files from the internet always carries inherent risks. However, a recent Windows security update considerably enhances your protection against potential threats. Microsoft has automatically disabled file previews in Explorer for downloaded files, bolstering your system’s defenses.
### Why the Change? Addressing NTLM Hash Leakage
This update directly addresses a critical vulnerability related to NTLM hash leakage. Specifically, previewing downloaded files containing HTML tags – like `` or `
Essentially, the preview function inadvertently created a security loophole. Microsoft’s proactive step closes this gap, safeguarding your data.
### How Windows Alerts You to Potential Risks
Windows utilizes “Mark of the Web” metadata to identify files downloaded from the internet. This triggers increased scrutiny from Windows Defender. Consequently, attempting to preview a downloaded file now displays a clear warning message:
> The file you are attempting to preview could harm your computer. If you trust the file and the source you received it from, open it to view its contents.
This alert prompts you to exercise caution and only proceed if you are confident in the file’s origin and integrity.
### Temporarily Overriding the Preview Block
Understandably, this change might occasionally disrupt your workflow. If you absolutely need to preview a downloaded file, you can temporarily override the block. Here’s how:
1. Right-click the file.
2. Select “Properties.”
3. Click “Unblock.”
Keep in mind that this process must be repeated for each file.Also, the unblocking may not take effect immediately, potentially requiring a system restart or log-in.### A Proactive Approach to Security
This update exemplifies Microsoft’s commitment to proactive security measures. By automatically disabling previews for downloaded files, they’ve significantly reduced your risk of falling victim to NTLM theft attacks. Prioritizing security, even with slight inconveniences, is a crucial step in protecting your digital life.
Ultimately, this change reinforces the importance of downloading files only from trusted sources. Staying vigilant and informed about potential threats remains your best defense.
